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  王振宇  劉晶波    （清華大學(xué)土木工程系  北京100084）

  彭敏文       （廣播電影電視總局設(shè)計(jì)院  北京 100866）

[提要]  探討具有水平連接剛度突變特征的鋼筋混凝土結(jié)構(gòu)的一般力學(xué)特點(diǎn)與動(dòng)力反應(yīng)分析方法。以莆田市廣播電視中心工程結(jié)構(gòu)為例，揭示結(jié)構(gòu)因水平連接剛度突變而導(dǎo)致的復(fù)雜振型、地震作用下局部動(dòng)應(yīng)力集中等特點(diǎn)。通過(guò)有限元法模擬了水平連接剛度突變處不同的連接方案對(duì)結(jié)構(gòu)動(dòng)力特性與地震反應(yīng)的影響。
[關(guān)鍵詞]  混凝土結(jié)構(gòu)  水平連接剛度突變  動(dòng)力特性  地震反應(yīng)  動(dòng)應(yīng)力集中

General mechanic differences and methods of dynamic response analysis of RC structure characterized by abrupt change in horizontal connection stiffness are discussed. For structure of Putian Center of Radio, Film and TV, complicated modals and stress concentration resulted from abrupt change in horizontal connection stiffness are revealed by FEM.Different connective plans located in place of abrupt change in horizontal connection stiffness have effects on structural dynamic properties and seismic response.
Keywords: abrupt change; horizontal connection stiffness; dynamic properties; seismic response; stress concentration